public class E4 {
   public static void main (String args[]) {
     int [] a={10,20,30,40},b[]={{1,2},{4,5,6,7}};
     b[0]=a;
     b[0][1]=b[1][3];
     System.out.println(b[0][3]);
     System.out.println(a[1]);
  }
}
